The company’s directors include Anatole Kaletsk, Sir Clive Cowdery and Stephen Peel who sit on the boards of the Soros funded Institute for New Economic Thinking and Open Society Foundations.

Ms Miller’s husband Alan has also known George Soros since at least 2003 when Soros took a $100million 40 per cent share in Miller’s New Star hedge funds.Robert Oulds, director of the Bruges Group, said: “If Gina Miller and her business backers are intent on influencing British politics, we invite them to be completely upfront about their supporters and any personal, political or professional links to foreign businessmen.